useful bounds can be set on the pressure at the center of star without detailed stellar structure calculations 4. a. show that in hydrostatic equilibrium the function gm(r)2 8rr4 decreases with r. hence, show that the central pressure satisfies the inequality p. go4/3m2/3 c613 where m* is the mass of the whole star. b. if you assume that the density ρ(r) decreases with r, it is possible to derive a tighter lower bound and, in addition, a useful upper bound for the central pressure. show that gō4/3m2/3 in addition, show that 1/3 nd誾 gp: /3m 4/3 42/3 where pc is the central density

An insurance company wants to know if the average speed at which men drive cars is higher than that of women drivers. the company took a random sample of 27 cars driven by men on a highway and found the mean speed to be 72 miles per hour with a standard deviation of 2.2 miles per hour. another sample of 18 cars driven by women on the same highway gave a mean speed of 68 miles per hour with a standard deviation of 2.5 miles per hour. assume that the speeds at which all men and all women drive cars on this highway are both approximately normally distributed with unknown and unequal population standard deviations.

When using two-wire cable to feed a 240-v appliance that does not require a neutral wire, you should a. mark both ends of the white wire green. b. use the cable as is. c. use only the black wire. d. mark both ends and any exposed area of the white wire black.

What organization and environment is described above?